Are the principles using credit cards? Reversing credit card write-offs is a common scam, initially writing off credit debt then cooking the books by reversing the write-off for annual reports. The fraud could also be carried on the accounting books as an unbilled disbursement "receivable."
Backdating checks to hide the date on which checks were received---in order to minimize the risk that school/bank auditors would discover fraudulent accounting practices.
Reclassifying expenses on financial statements to seemingly reduce expenses. This change in treatment is usually not disclosed to auditors or properly classified on official financial statements.
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TAX_EXEMPT BOND OFFERINGS -- The SEC would be interested in possible Fraudulent Methods WRT misleading bond offerings, defrauding investors by misleading them about use of tax-exempt monies; using falsified marketing materials to mislead investors.
Is there a local “Master Plan”?
That might describe certain fraudulent accounting adjustments pursued as part of a sub rosa scheme; engaging in fraudulent conduct to mislead WRT tax revenue, expenses, or payments; perhaps structuring transactions as "loan repayments" to falsify revenue.
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Is there leveraging of tax dollars to secure bank loans that benefit principles?
Perhaps classifying fraudulent withdrawals as revenue on official documents?